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Volume 14, Number 5—May 2008


Risk Factors for Sporadic Shiga Toxin–producing Escherichia coli Infections in Children, Argentina1

Marta Rivas*, Sergio Sosa-Estani†, Josefa Rangel‡, Maria G. Caletti§, Patricia Vallés¶, Carlos D. Roldán§, Laura Balbi¶, Maria C. Marsano de Mollar#, Diego Amoedo§, Elizabeth Miliwebsky*, Isabel Chinen*, Robert M. Hoekstra‡, Paul S. Mead‡, and Patricia M. Griffin‡Comments to Author 
Author affiliations: *Instituto Nacional de Enfermedades Infecciosas, Buenos Aires, Argentina; †Centro Nacional de Endemoepidemias, Buenos Aires, Argentina; ‡Centers for Disease Control and Prevention, Atlanta, Georgia, USA; §Hospital Nacional de Pediatría, Buenos Aires, Argentina; ¶Hospital Pediátrico, Mendoza, Argentina; #Ministerio de Desarrollo Social y Salud, Mendoza, Argentina;

Main Article

Table 2

Univariate analysis of protective factors for Shiga toxin–producing Escherichia coli infections, unadjusted and adjusted, and adjustment factors, Buenos Aires and Mendoza, Argentina, 2001–2002

Characteristic %
Case-patients† (N = 150) % Controls† (N = 299) Unadjusted univariate analysis
Adjusted univariate analysis*
mOR 95% CI p value mOR 95% CI p value
Protective factors
Eating meatballs at home 17 29 0.46 0.3–0.8 0.004 0.44 0.2–0.8 0.010 M
Eating meat pie at home 11 23 0.40 0.2–0.8 0.004 0.47 0.2–0.9 0.025
Eating empanadas at home 20 34 0.43 0.3–0.7 0.001 0.49 0.3–0.9 0.016 M
Respondent always washing hands with soap and water after handling raw beef

B, M
Fixed adjustment factors
Eating more than the median number of fruits and vegetables 33 51 0.42 0.3–0.7 0.0002 B, M
Male sex 43 57 0.57 0.4–0.9 0.01 B, M
Having a nonparent respondent 3 1 0.29 0.1–0.8 0.009 M
Respondent always washing hands after handling raw beef 74 90 0.27 0.1–0.5 0.0001 B, M

*Adjusted by the fixed adjustment factors shown. mOR, matched odds ratio; CI, confidence interval.
†The denominator (number of respondents) for case-patients varied from 144 to 150. The denominator for controls varied from 298 to 299.
‡Denotes adjusted univariate analysis significant in Buenos Aires (B), Mendoza (M), or neither site (–).

Main Article

1Part of the information in this article was presented at the 5th International Symposium and Workshop on Shiga Toxin (verocytotoxin)–Producing Escherichia coli Infections, June 2003, Edinburgh, Scotland, United Kingdom, Abstract 0-5, p.19.

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